gcc/testsuite/gcc.dg/builtin-object-size-10.c

   1 /* { dg-do compile } */
   2 /* { dg-options "-O2 -fdump-tree-objsz-details" } */
   3
   4 typedef struct {
   5     char sentinel[4];
   6     char data[0];
   7 } drone_packet;
   8 typedef struct {
   9     char type_str[16];
  10     char channel_hop;
  11 } drone_source_packet;
  12 drone_packet *
  13 foo(char *x)
  14 {
  15   drone_packet *dpkt = __builtin_malloc(sizeof(drone_packet)
  16                                         + sizeof(drone_source_packet));
  17   drone_source_packet *spkt = (drone_source_packet *) dpkt->data;
  18   __builtin___snprintf_chk (spkt->type_str, 16,
  19                             1, __builtin_object_size (spkt->type_str, 1),
  20                             "%s", x);
  21   return dpkt;
  22 }
  23
  24 /* { dg-final { scan-tree-dump "maximum object size 21" "objsz" } } */
  25 /* { dg-final { scan-tree-dump "maximum subobject size 16" "objsz" } } */
  26 /* { dg-final { cleanup-tree-dump "objsz" } } */